Hydrotalcite Catalysts Prepared Using Combustion Method For Selective Etherification Of Glycerol To Diglycerol

The concern on the depleting problem of petroleum diesel has encouraged many attempts to alternatively replace it with biodiesel fuel. Unfortunately, the enormous increase in the biodiesel production has mainly caused the surplus of glycerol production. Researches on utilizing and upgrading glycerol...

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Main Author:	Anuar, Mohd.Razealy
Format:	Thesis
Language:	English
Published:	2013
Subjects:	TP1-1185 Chemical technology
Online Access:	http://eprints.usm.my/43404/1/Mohd.Razealy%20Anuar24.pdf
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spelling	my-usm-ep.434042019-04-12T05:26:18Z Hydrotalcite Catalysts Prepared Using Combustion Method For Selective Etherification Of Glycerol To Diglycerol 2013-01 Anuar, Mohd.Razealy TP1-1185 Chemical technology The concern on the depleting problem of petroleum diesel has encouraged many attempts to alternatively replace it with biodiesel fuel. Unfortunately, the enormous increase in the biodiesel production has mainly caused the surplus of glycerol production. Researches on utilizing and upgrading glycerol to value-added products should be promoted to stabilize the global market of glycerol. In the present study, glycerol was upgraded to diglycerol through a basic-catalyzed etherification reaction. The reaction was carried out in the presence of hydrotalcite as catalyst. Hydrotalcite was prepared using a combustion method. The hydrotalcite synthesis was studied by focusing on different experimental variables i.e. types of fuel used, calcinations temperatures, multi-anion source and amount of CO32- anion. For the etherification process, the catalytic activity of hydrotalcite was performed at the reaction temperatures between 200oC to 240oC in 16 h. The reaction kinetics was studied by varying the reaction temperature from 200oC to 260oC. The textural and chemical characteristics of the hydrotalcite were elucidated by means of X-ray diffraction for crystallinity, surface analysis for surface characteristics, Hammett indicator for basicity and basic strength, SEM for surface morphology and EDX for chemical composition. Glucose, fructose and saccharose were used as fuel and the calcination temperature were 450oC to 850oC. Glucose was identified as the most favourable fuel where the resulting catalyst was the most active with a conversion of 12.34 % and diglycerol selectivity of 97.73 % in 8 h. 2013-01 Thesis http://eprints.usm.my/43404/ http://eprints.usm.my/43404/1/Mohd.Razealy%20Anuar24.pdf application/pdf en public masters Universiti Sains Malaysia Pusat Pengajian Kejuruteraan Kimia
institution	Universiti Sains Malaysia
collection	USM Institutional Repository
language	English
topic	TP1-1185 Chemical technology
spellingShingle	TP1-1185 Chemical technology Anuar, Mohd.Razealy Hydrotalcite Catalysts Prepared Using Combustion Method For Selective Etherification Of Glycerol To Diglycerol
description	The concern on the depleting problem of petroleum diesel has encouraged many attempts to alternatively replace it with biodiesel fuel. Unfortunately, the enormous increase in the biodiesel production has mainly caused the surplus of glycerol production. Researches on utilizing and upgrading glycerol to value-added products should be promoted to stabilize the global market of glycerol. In the present study, glycerol was upgraded to diglycerol through a basic-catalyzed etherification reaction. The reaction was carried out in the presence of hydrotalcite as catalyst. Hydrotalcite was prepared using a combustion method. The hydrotalcite synthesis was studied by focusing on different experimental variables i.e. types of fuel used, calcinations temperatures, multi-anion source and amount of CO32- anion. For the etherification process, the catalytic activity of hydrotalcite was performed at the reaction temperatures between 200oC to 240oC in 16 h. The reaction kinetics was studied by varying the reaction temperature from 200oC to 260oC. The textural and chemical characteristics of the hydrotalcite were elucidated by means of X-ray diffraction for crystallinity, surface analysis for surface characteristics, Hammett indicator for basicity and basic strength, SEM for surface morphology and EDX for chemical composition. Glucose, fructose and saccharose were used as fuel and the calcination temperature were 450oC to 850oC. Glucose was identified as the most favourable fuel where the resulting catalyst was the most active with a conversion of 12.34 % and diglycerol selectivity of 97.73 % in 8 h.
format	Thesis
qualification_level	Master's degree
author	Anuar, Mohd.Razealy
author_facet	Anuar, Mohd.Razealy
author_sort	Anuar, Mohd.Razealy
title	Hydrotalcite Catalysts Prepared Using Combustion Method For Selective Etherification Of Glycerol To Diglycerol
title_short	Hydrotalcite Catalysts Prepared Using Combustion Method For Selective Etherification Of Glycerol To Diglycerol
title_full	Hydrotalcite Catalysts Prepared Using Combustion Method For Selective Etherification Of Glycerol To Diglycerol
title_fullStr	Hydrotalcite Catalysts Prepared Using Combustion Method For Selective Etherification Of Glycerol To Diglycerol
title_full_unstemmed	Hydrotalcite Catalysts Prepared Using Combustion Method For Selective Etherification Of Glycerol To Diglycerol
title_sort	hydrotalcite catalysts prepared using combustion method for selective etherification of glycerol to diglycerol
granting_institution	Universiti Sains Malaysia
granting_department	Pusat Pengajian Kejuruteraan Kimia
publishDate	2013
url	http://eprints.usm.my/43404/1/Mohd.Razealy%20Anuar24.pdf
_version_	1747821207336517632

Hydrotalcite Catalysts Prepared Using Combustion Method For Selective Etherification Of Glycerol To Diglycerol

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